Patent GB-189712413-A (GB)
Title: Improvements in Machinery for Operating on Leather or other Skins or Hides.
Inventor: HALL JOSEPH
Filed: 1897-05-19
Granted: 1898-05-19
Abstract: 12,413. Hall, J. May 19. Hides and skins, tanned or tawed, treating.- Relates to machines for softening, grinding, or setting-out hides and skins. The cylinders employed have helical or straight wavy blades as shown in Fig. 1, affording a large number of points of action. Blades of similar form may be mounted on an endless band or apron running on two cylinders. Fig. 6 shows a machine in which the band A carries blades A', A<2> such as are shown in Fig. 8. The skin is supported upon a spring-bedded table D which can be raised and lowered bv means of the treadle-lever E'. When the table is lowered the rubber nipping-roll F<1>, which works in conjunction with the similar roll B<9>, falls with it, and the skin is passed on to the table between them. On raising the table the nipping-rolls pull the skin out against the action of the blades A', A<2>. An adjustable plate G presses on the inner side of the apron. In another form of endless-band machine, two anrons bearing blades are employed, the blades of the one working between those of the other so as to thoroughly soften and stretch the skin between them. Fig. 15 shows in side elevation a form of machine in which the skins are hung over a vertical table K which rises and falls between the bladed rollers A. The apron which covers the table is automatically oscillated to some extent from one side to the other in order to ensure the working of the whole surface of the skins which rest on it. It is also pulled out laterally during the upward movement by two rollers V placed beneath it on each side of the table. In this way contact is ensured between the apron and the rollers A over a considerable part of their circumferance. The rollers A are mounted on levers which enable them to be opened apart or approached to the table as required. The table is automatically raised and lowered by the chains R<4> actuated by the wheels R<3>, shaft R, wheel and chain R', and clutch P, which is released when the table has reached its highest point. A nipping- bar X is arranged to grip the skins to the table during the upward movements and to release them as the table descends. The blades on the rollers A may be sharpened by adjustable curved steels which can be brought in contact with them when required and oscillated so as to sharpen the blade edges, the cylinders being thrown out of gear and held at rest during the operation. Fig. 35 shows a part sectional view of another form of machine in which one working roller A alone is used, the apron K, which passes over the spring-controlled rollers C<1>, being held at the ends by standards supported on a reciprocating table, so as to pass the skins to and fro beneath the roller A. A nipping-device is provided at one end for the skins. The apron is raised against the roller A by the rod D<3> and toggle-joint D<4>, D<8>, D<5>, D<9>. The details of the mechanism are fully described in the Specification with the aid of ten sheets of Drawings. Reference is made to Specifications No. 1503, A.D. 1886, No. 23,720, A.D. 1894, and No. 4199, A.D. 1896.